Cooling method for two-compartment refrigerator

FIELD: cooling, particularly self-contained movable devices, domestic refrigerators with several compartments.

SUBSTANCE: method involves successive pumping cooling agent in condenser; throttling thereof; moving cooling agent to cooling chamber evaporator; additionally throttling thereof and feeding cooling agent to freezing chamber evaporator with following sucking cooling agent off; drying vapor-and-liquid mixture in cooing chamber evaporator under temperature of 0 … - 5oC; boiling vapor-and-liquid mixture in freezing chamber evaporator under temperature of -20 … -30oC.

EFFECT: reduced energy losses.

1 dwg

 

The invention relates to refrigeration and can be used to create and maintain different temperatures in the refrigeration and freezer and two refrigerators.

The known method based on the sequential flow of refrigerant through the evaporator of the freezing and refrigerating chambers [EN, 290576, F 25 D 11/02].

The disadvantage of this method is the relatively high losses of energy during the expansion of the refrigerant in the evaporator of the refrigerating chamber to the level of pressure in the evaporator of the refrigerating chamber.

The closest entity to the present invention is a method of cooling a two-chamber refrigerator, based on the sequential injection of refrigerant into the condenser, its pre-throttling, flow into the evaporator of the refrigerating chamber, throttling and flow into the evaporator of the freezing chamber with its subsequent suction [SU, 1409832, A1, F 25 D 11/02, 1988].

The disadvantage of this method is the relatively high energy losses during its implementation.

The desired result is to reduce energy losses.

The desired result is achieved that, in the cooling method, two-chamber refrigerator, based on the sequential injection of refrigerant into the condenser, throttling, flow into the evaporator of the refrigerating chamber, updat the additional throttling and flow into the evaporator of the freezing chamber, followed by suction, in the evaporator of the refrigerating chamber of the liquid-vapor mixture is dried at a temperature of 0...-5 degrees C, and in the evaporator of the freezing chamber of the liquid-vapor mixture docial at the boiling temperature of -20...-30 degrees C.

The drawing shows a diagram of a device for implementing a method of cooling a two-chamber refrigerator.

The device has connected in series compressor 1, condenser 2, advanced the throttle 3, the evaporator 4 of the refrigerating chamber, the orifice 5 and the evaporator 6 freezer. The evaporator 4 is placed in the cooling chamber 7 and the evaporator 6 - in freezer 8.

The operation of the cooling method, two-chamber refrigerator implemented as follows.

The compressor 1 pump steam into the condenser 2, from which liquid refrigerant enters the pre-reactor 3 and is pre-throttling. From the preliminary reactor 3 refrigerant is directed into the evaporator 4 of the refrigerating chamber 7, in which the liquid-vapor mixture is partially dried at a temperature of 0...-5 degrees C. Then the liquid-vapor mixture is throttled in the throttle 6 and fed into the evaporator 6 of the freezing chamber 8, where docial at the boiling temperature of -20...-30 degrees C.

The proposed method of cooling a two-chamber refrigerator allows you to maintain the boiling point Ho is obilnogo agent in the evaporator of the refrigerating chamber at the level -20...-30 ° C, and the wall temperature of the evaporator of the refrigerating chamber above the freezing temperature of water vapor with a simultaneous increase of the heat transfer coefficient of the wall due to the greater its wettability of the liquid-vapor mixture entering the evaporator and condensation on its outer surface for water vapor. In the whole volume of the evaporator of the refrigerating chamber is a vapor-liquid mixture without areas of superheated steam at the same temperature, so the entire surface of the evaporator is cooled evenly.

The structure of the device that implements the proposed method can be enabled filter-drier, a regenerative heat exchanger, decimater.

Thus, thanks to the introduction of operations preliminary throttling the refrigerant prior to its supply from the condenser to the evaporator of the refrigerating chamber will be substantially reduced energy losses, which is a technical result because the eliminated terms of inebration on the evaporator of the refrigerating chamber and increases the uniformity of the cooling surface of the evaporator of the refrigerating chamber.

Cooling method two-chamber refrigerator, based on the sequential injection of refrigerant into the condenser, throttling, flow into the evaporator of the refrigerating chamber, additional throttling and flow into the evaporator freezing Cam the market, followed by suction, characterized in that the evaporator of the refrigerating chamber of the liquid-vapor mixture is dried at a temperature of 0÷(-5)°and in the evaporator freezer - docial at boiling point (-20)÷(-30)°C.



 

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